Black spot of Roses – A brief discussion and related references and links for selecting dis-ease resistant roses for your garden. MT Kingsley, Ph.D.
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Black spot of rose is an ascomyte fungal disease caused by the pathogen Marssonina rosae (Mr, the imperfect or asexual stage / Diplocarpon rosae (Dr) is the sexual stage). This pathogen is likely the most serious and common disease of … Read More